Time and Distance
Exercise:: Time and Distance-General Questions 2. km/h to m/s Conversion: 3. m/s to km/h Conversion 4. If the ratio of the speeds of A and B is a : b, then the ratio of the time taken by them to cover the same distance is 1/a : 1/b or b : a
1. Speed, Time and Distance
Speed = Distance/Time, Time = Distance/Speed, Distance = (Speed x Time)
a km/hr = (a x 5/18)m/s
a m/s =(a x 18/5)km/hr
5. Suppose a man covers a certain distance at x km/h and an equal distance at y km/h. Then, the average speed during the whole journey is (2xy / (x +y)) km/h.
1. A Car is moving at the speed of 72 km/h. What is the speed of car in metres per second ?
A. 15 m/s
B. 20 m/s
C. 25 m/s
D. 27.5 m/s
Speed=72 km/h = 72 x 5/18 m/sec = 20 m/sec.
Answer: Option B
Explanation: